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| On-Line Temperature Monitoring for GIS Disconnecting Switch Contacts Based on Multipoint-Distributed Fiber Bragg Grating |
| Chen Qiang1,3,Li Qingmin1,3,Cong Haoxi2,3,Xing Jinyuan1,3,Li Jinsong1,3 |
1. Beijing Key Laboratory of High Voltage and EMC North China Electric Power University Beijing 102206 China;
2. Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment Shandong University Jinan 250061 China;
3. State Key Lab of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China |
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Abstract In the GIS equipment, if the temperature of the conductor contact is too high, it will lead to a major accident. The on-line temperature monitoring technology based on Fiber Bragg Grating has broad application prospects. For the situations that the FBG temperature sensor cannot be fixed on the surface of conductor contacts, a method to indirectly obtain the temperature of the contacts by directly measuring the multipoint shell temperature and the environmental temperature was proposed in this paper. The three-dimensional heat transfer model of the GIS disconnecting switch was established and the temperature distribution around the contact section was acquired. Based on the simulation results, the installation positions of the FBG temperature sensors were determined. Then experimental studies were taken to validate the accuracy of the simulation model. Finally, the neural network algorithm was used to deal with the experimental temperature data of contacts, multipoint shell and environment, and results showed a high accuracy. The method is simple and effective, without destroying the structure of the GIS equipment, which would have a good application prospect.
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Received: 20 September 2014
Published: 14 September 2015
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2015, Vol. 30 
